My brother has gone weird in the past yr. He's in gang now. He used to be sweet and liked hanging out with me. I'm 16 and he's 15. He's constantly pissing off my mum and almost every day I see them fighting. He never listens to anything mum tells him and is always walking out of the house even when mum tells him not to. He's been caught by police with knives a number of times and my parents don't know what to do. He was never raised to be like this. I love him and wish it could be like old times between us. He's my only sibling and I wish there was something I could do to stop his craziness. I know there's still a good kid him... I just don't know how to bring that kid out. I've talked to my bro about this before, told him I miss him and I want him to make something with his life. He simply told me thanks for the concern but I'm fine. I know he's not fine... he needs to change. Please help! What can I do to help?

All your family should have a meeting with him, so they can talk real serious.
Look for professional help. Like counselor, teacher, or doctors. "I think he's mad because of his friends or girlfriend" You as his sister should tell him what you feel about his behavior. He may recognize it and may change it, who know? "never say never". Good Luck! Anything happen just Let me know? =)

If he truly is in a gang, you will need professional help if he wants out, if he does not want out, there is little you can do.
If there is a boot camp to send him to though Juv system, and then send him away from where you live to another state where he can start over In fact with gangs, often it will be very dangerous for him to even try to leave. Many times members are killed if they do. And as a gang member he puts you and your family lives at risk.

Oh, you poor thing! That's got to be a heartbreaking thing to watch. Your brother is tearing your family apart and probably doesn't have a clue how much damage he's really doing.

The only advice I can give you is to steer clear of his gang relationships and any illegal activities. You can love your brother from a distance right now without winding up on the bad end of a drive-by shooting or a police raid. You can never change another person; you can only change yourself. Be there for him when he feels he's ready to turn it around, but know that that can take years... decades, if he lives that long! Support your mum as best you can. She needs someone to help take the sting out of potentially losing her son. Keep telling him you miss him and love him, but don't do anything to enable him to continue on his current path. That won't help him or you. And don't hesitate to turn him in if you know he's done something he shouldn't! Sometimes "tough love" is the best kind.